Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > GENERAL DISCUSSIONS > Tow Vehicles & Towing
Click Here to Login

Reply
 
Thread Tools Display Modes
 
Old 07-13-2013, 08:51 AM   #1
jrpend
Established Member
 
Join Date: Jun 2013
Location: Castro Valley
Posts: 12
M.O.C. #13482
Newbie question: Axle Ratio?

Hi -
Once again shopping for the UTV (Ultimate tow vehicle) for a future Montana 3402RL.

Based on the input from this forum, it will be a long bed and 90% sure it will be diesel (my preference).

Configuring the truck on the internet, I get asked about Axle ratio. I know the higher the number the more torque.

Is the Axle ratio important with a diesel?

Does anyone know the benefit of these "Electronic Locking Axles"?

Thanks,
Jerald Pendleton
Montana Wannabe
jrpend is offline   Reply With Quote
Old 07-13-2013, 09:11 AM   #2
jsmitfl
Montana Master
 
Join Date: Jun 2004
Location: Victor
Posts: 865
M.O.C. #1709
Send a message via MSN to jsmitfl
If you buy the Chevy Duramax, it comes with 3.73 automatically. Have owned three of them and have even put a one size bigger tire one them and have had no problems pulling the fiver. We even pull in the western mountains and they do well. As far as the electronic locking axles???
jsmitfl is offline   Reply With Quote
Old 07-13-2013, 09:25 AM   #3
bigskyjimmy
Montana Master
 
Join Date: Aug 2010
Location: Washington Coast
Posts: 2,688
M.O.C. #10696
jsmitfl is right about the Duramax 3.73 and it seems perfect gear ratio for them...Ford and Dodge guys can tell ya if they have a choice of ratio's but with these New MONSTER diesel's I would think 3.73 is all you need, Now if you are looking at Gas 4.10 0r 4.11 FOR SURE!
__________________
[
bigskyjimmy is offline   Reply With Quote
Old 07-13-2013, 10:17 AM   #4
NCFischers
Montana Master
 
Join Date: Aug 2008
Location: New Bern
Posts: 4,104
M.O.C. #8728
Send a message via Yahoo to NCFischers
The new GM trucks have an option of a 3:73 or a 4:10 rear end. The 4:10 will increase your towing capacity a bit but will slightly lower your fuel milage. My 3:73 works well for me.
NCFischers is offline   Reply With Quote
Old 07-13-2013, 10:52 AM   #5
DQDick
Montana Master
 
DQDick's Avatar
 
Join Date: Jun 2011
Location: Wilsey
Posts: 15,472
M.O.C. #11455
We have a truck speced for the dealer as a max tow truck and it has the 4 rear end. With the Cummins diesel I still get 11 towing the Monty and 18 or more without it. Don't ask about the in town milage. It doesn't have a fuel pump just uses a German beer stine.
__________________
Dick and Joyce, Wilsey, KS & Lakewood, NM
2017 3720 RL, MorRyde pin box
2017 3500 Dodge Maxi Cab DRW 4X4, Pullrite Hitch
IS and Disk Brakes, 3rd AC, Bathroom door mod, etc.
DQDick is offline   Reply With Quote
Old 07-13-2013, 03:04 PM   #6
WeBeFulltime
Montana Master
 
WeBeFulltime's Avatar
 
Join Date: May 2011
Location: Hixson
Posts: 2,779
M.O.C. #11397
My Dodge does just fine with the 3.73.
__________________
2018.5 Montana 3791RD
2012 F350 SRW 6.7 PSD

Full Timing since September 1, 2010
WeBeFulltime is offline   Reply With Quote
Old 07-13-2013, 03:12 PM   #7
Montana Sky
Montana Master
 
Join Date: Jan 2004
Location: Down the Road
Posts: 5,627
M.O.C. #889
I've run the 3.73 rear end in all of my trucks (Silverado's and Ram's). This combination provides the best combination of fuel economy and towing capacity. My current Ram has the 3.73 rear end with the max tow package from the 4.10. Gives me the towing capacity of the 4.10 while getting the fuel economy of the 3.73. Happy truck shopping!
Montana Sky is offline   Reply With Quote
Old 07-13-2013, 03:14 PM   #8
sambam
Montana Master
 
sambam's Avatar
 
Join Date: Jan 2013
Location: Bridgewater
Posts: 1,161
M.O.C. #13166
These new diesels don't need a lot of low-end gearing to get things moving. In the past, GM offered the Duramax with 3.73 and that was it. I don't understand the need for all the options. To me, 3.73 is a reasonable gear for all-around performance. But that's the way things are nowadays. The market is flooded with options. If you need more proof, go to Home Depot and check out the light bulb selection.
__________________

2010 Montana 3455SA, Mor/Ryde pin, wet bolts, TST 507, Progressive HW50C, GY G614
2007.5 Silverado D/A 3500HD DRW, Bilstein, Banks IQ, Economind, Speedbrake, RamAir, Monster exhaust, Reese R20.
sambam is offline   Reply With Quote
Old 07-13-2013, 03:37 PM   #9
mlh
Montana Master
 
Join Date: Oct 2004
Location: Salem
Posts: 4,287
M.O.C. #2283
Unlike older trucks with 200 HP AND 500 pound feet of TK these new trucks have so much power you can get away with gear ratios of .373 .355 or even higher. So you don't need to worry as much about having enough power and as an added bonus you get a little fuel mileage.
"Electronic Locking Axles"?
When one wheel starts to slip the truck detects wheel slippage and locks the axles to gain better traction instead of limited slip. Electronic Locking Axles are better than limited slip. I have limited slip and would rather have Electronic Locking Axles.
I don't know which truck you are looking at but do yourself a favor and go look at all three drive them all several times, then choose the best one for YOU.
Lynwood
mlh is offline   Reply With Quote
Old 07-13-2013, 04:31 PM   #10
mobil
Montana Fan
 
Join Date: May 2010
Location: Louisville
Posts: 159
M.O.C. #10437
I wouldn't go with anything lower than 3:73. Yah, all these truck have gobs of tq and hp. All the ratios they match them with will get you down the road. But, to keep your engine in the "sweet" spot(rpm wise), you need to match up the ratio with the weight you expect to pull. My truck would've been ok with the 3:73's but it would've been close to it's max tow rating(you gotta use the gross veh weight rating of the trailer, not the actual weight as it sits on the dealers lot), and a lot of guys pull my weight(my 3665 has a gvwr of 15,500, I think)with 3:73's and have no problems. I have the 4:10's. It gives me an extra 1000lbs cushion before maxing out and extra piece of mind. I don't mind the small penalty in fuel milage. I get 16 mpg hwy empty and 9-11 mpg loaded with the Montana and whatever goodies we can cram in the truck and trailer. It's really peanuts compared to the overall cost of the rv + truck + other toys for it all.
mobil is offline   Reply With Quote
Old 07-14-2013, 04:51 AM   #11
racerjoe
Montana Master
 
Join Date: Oct 2007
Location: silver creek
Posts: 1,507
M.O.C. #7770
I know the 2012 ford diesels only came with one rear gear. but the new motor,more than makes up for any issues. I have heard no complaints with the combo
racerjoe is offline   Reply With Quote
Old 07-14-2013, 11:22 AM   #12
CORattler
Montana Master
 
CORattler's Avatar
 
Join Date: Jun 2010
Location: Colorado Springs
Posts: 3,335
M.O.C. #10496
Higher gear ratio = more torque/faster "off the line" and higher RPM to achieve the same speed than say a 3:73. Higher RPM usually results in somewhat less MPG than a lower geared vehicle (all other things being equal).
I tow 12,000 lbs in the Rockies with 3:73 with no problem. If I was looking for more torque "off the line" I'd have gotten the 4:10.
I strongly suggest a dually because of the weight of the rig you propose to tow.
Good luck!
__________________
2010 3150RL
LevelUp, Dual 6 volt batteries, Progressive Industries EMS HW50C, Honda EU2000i Generator, Bridgestone Duravis R250 tires, Torklift Glowstep Revolution Stairs, LED Tail lights
2015 RAM 3500 Laramie SRW LB CC Cummins 6.7L Aisin Trans B&W RVK3600
CORattler is offline   Reply With Quote
Old 07-14-2013, 12:11 PM   #13
CORattler
Montana Master
 
CORattler's Avatar
 
Join Date: Jun 2010
Location: Colorado Springs
Posts: 3,335
M.O.C. #10496
Locking axles = http://en.wikipedia.org/wiki/Locking_differential
Electronic means locking them is usually via an " in cab" on/ off switch. Likely actuates a servo mechanism in the differential.
This is useful if you go off road or get in situations where you need to have both wheels on the same axle provide equal torque.
__________________
2010 3150RL
LevelUp, Dual 6 volt batteries, Progressive Industries EMS HW50C, Honda EU2000i Generator, Bridgestone Duravis R250 tires, Torklift Glowstep Revolution Stairs, LED Tail lights
2015 RAM 3500 Laramie SRW LB CC Cummins 6.7L Aisin Trans B&W RVK3600
CORattler is offline   Reply With Quote
Old 07-14-2013, 03:28 PM   #14
richfaa
Montana Master
 
Join Date: Jan 2005
Location: North Ridgeville
Posts: 19,208
M.O.C. #2839
My 08 6.4 Ford diesel has the 4:10.It came that way. IMO the 3:73 is enough. The MPG is not all that different as observed with the guys I pull with. We are all in fueling at the same time and take on the more or less same fuel load.
richfaa is offline   Reply With Quote
Old 07-14-2013, 05:35 PM   #15
kab449
Montana Master
 
Join Date: Oct 2011
Location: Lykens
Posts: 545
M.O.C. #11842
Locking rear axle on my truck used two times. Once to make sure it worked, and another time when I couldn't make it up a hill with about 6 inches of snow. Didn't make much difference getting me up the hill, I still needed to engage the 4 wheel drive.
kab449 is offline   Reply With Quote
Old 07-15-2013, 03:28 AM   #16
MIMF
Montana Master
 
Join Date: Jan 2005
Location: Goshen
Posts: 1,058
M.O.C. #2827
My old Silverado has the 3:73 rear end. Our Challenger has weighed 13,3?? lbs. and 13,5?? lbs. both times I have weighed it over the years. It grosses at 14,100 pounds so, I try to pay close attention. My point is, granted, the newer Montanas are probably heavier than my older unit but, the Duramax and Allison are a perfect match for the standard rear that GM puts in the truck and I don't have to use the tow haul mode on the tranny. There-by getting respectable fuel mileage. We just completed a 9 day tour around Lake Michigan and Green Bay with no power issues what-so-ever!
MIMF is offline   Reply With Quote
Old 07-15-2013, 04:10 AM   #17
Captain Joe
Montana Master
 
Join Date: Sep 2010
Location: Hollister
Posts: 1,043
M.O.C. #10764
You said "Ultimate Tow Vehicle." You can buy two of the trucks in my signature for the price of one new 1-ton Diesel and have the best ride.
Captain Joe is offline   Reply With Quote
Old 07-15-2013, 04:15 AM   #18
Samiterry
Montana Fan
 
Join Date: Feb 2013
Location: Lafayette
Posts: 186
M.O.C. #13257
Back in 1999, we bought a new 3500 Silverado with a gas 454 with a 456 rear end. I didn't think anything could out pull this truck...........until............2002. We bought a 2500hd Silverado with the Duramax/Allison and 373 gear. I couldn't believe the difference. Much more power and torque. We now have a 2005 3500hd Siverado with the same combo. Love it!
Samiterry is offline   Reply With Quote
Old 07-15-2013, 05:23 AM   #19
mazboy
Montana Master
 
Join Date: Aug 2009
Location: Grand Rapids
Posts: 1,051
M.O.C. #9561
i'd recommend a short box. the way the hitch is attached to the 3402, it will be very rare that you need to have a long box.


advantage of short box to me is the parking and my wife likes it better than a long box.

and yes, get a diesel, do NOT get a gas truck...we know from experience. and, i'd recommend a one ton (not a dually) rather than a 3/4 ton.
mazboy is offline   Reply With Quote
Old 07-15-2013, 08:13 AM   #20
stiles watson
Montana Master
 
Join Date: Sep 2004
Location: Leona
Posts: 6,382
M.O.C. #2059
I had a 2008 King Ranch Ford F350 dually. I thought I had bought a 4:10. But found later that it was a 4:33. Lots of power and torque, but it was a diesel sucking combo. Even not pulling on a good day I would get 14-15 mpg. Towing my Big Sky the best was about 9 going down hill with a tail wind (some exaggeration here). I traded for a 2011 King Ranch F350 6.7 SWD with a 3:55. There was no downside in power and towing, but huge difference in mileage.
stiles watson is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
REAR AXLE RATIO FORD F350 artfuldodger Tow Vehicles & Towing 22 11-25-2013 08:01 AM
Another newbie question DQDick General Discussions about our Montanas 3 08-05-2011 09:37 AM
Axle ratio ddettorre Tow Vehicles & Towing 5 05-22-2010 07:01 AM
emissions recall J22-- AXLE RATIO turley Tow Vehicles & Towing 3 03-30-2010 01:11 PM
Newbie question fjldhp Brrr it's cold outside! Winter Camping 8 12-08-2007 04:13 AM

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Montana RV, Keystone RV Company or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 08:55 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.